def test_fullrank(self):
X = standard_normal((40,10))
X[:,0] = X[:,1] + X[:,2]
Y = tools.fullrank(X)
self.assertEquals(Y.shape, (40,9))
self.assertEquals(tools.rank(Y), 9)
X[:,5] = X[:,3] + X[:,4]
Y = tools.fullrank(X)
self.assertEquals(Y.shape, (40,8))
self.assertEquals(tools.rank(Y), 8)
def __init__(self, sys, sigma=None, dfk=None):
if len(sys) % 2 != 0:
raise ValueError, "sys must be a list of pairs of endogenous and \
exogenous variables. Got length %s" % len(sys)
if dfk:
if not dfk.lower() in ['dfk1','dfk2']:
raise ValueError, "dfk option %s not understood" % (dfk)
self._dfk = dfk
M = len(sys[1::2])
self._M = M
# exog = np.zeros((M,M), dtype=object)
# for i,eq in enumerate(sys[1::2]):
# exog[i,i] = np.asarray(eq) # not sure this exog is needed
# used to compute resids for now
exog = np.column_stack(np.asarray(sys[1::2][i]) for i in range(M))
# exog = np.vstack(np.asarray(sys[1::2][i]) for i in range(M))
self.exog = exog # 2d ndarray exog is better
# Endog, might just go ahead and reshape this?
endog = np.asarray(sys[::2])
self.endog = endog
self.nobs = float(self.endog[0].shape[0]) # assumes all the same length
# Degrees of Freedom
df_resid = []
df_model = []
[df_resid.append(self.nobs - tools.rank(_)) \
for _ in sys[1::2]]
[df_model.append(tools.rank(_) - 1) for _ in sys[1::2]]
self.df_resid = np.asarray(df_resid)
self.df_model = np.asarray(df_model)
# "Block-diagonal" sparse matrix of exog
sp_exog = sparse.lil_matrix((int(self.nobs*M),
int(np.sum(self.df_model+1)))) # linked lists to build
self._cols = np.cumsum(np.hstack((0, self.df_model+1)))
for i in range(M):
sp_exog[i*self.nobs:(i+1)*self.nobs,
self._cols[i]:self._cols[i+1]] = sys[1::2][i]
self.sp_exog = sp_exog.tocsr() # cast to compressed for efficiency
# Deal with sigma, check shape earlier if given
if np.any(sigma):
sigma = np.asarray(sigma) # check shape
elif sigma == None:
resids = []
for i in range(M):
resids.append(GLS(endog[i],exog[:,
self._cols[i]:self._cols[i+1]]).fit().resid)
resids = np.asarray(resids).reshape(M,-1)
sigma = self._compute_sigma(resids)
self.sigma = sigma
self.cholsigmainv = np.linalg.cholesky(np.linalg.pinv(\
self.sigma)).T
self.initialize()
def checkMovingOLS(self, window_type, x, y, **kwds):
window = tools.rank(x.values) * 2
moving = ols(y=y, x=x, window_type=window_type, window=window, **kwds)
if isinstance(moving.y, Series):
index = moving.y.index
elif isinstance(moving.y, LongPanel):
index = moving.y.major_axis
for n, i in enumerate(moving._valid_indices):
if window_type == 'rolling' and i >= window:
prior_date = index[i - window + 1]
else:
prior_date = index[0]
date = index[i]
x_iter = {}
for k, v in x.iteritems():
x_iter[k] = v.truncate(before=prior_date, after=date)
y_iter = y.truncate(before=prior_date, after=date)
static = ols(y=y_iter, x=x_iter, **kwds)
self.compare(static, moving, event_index=i, result_index=n)
_check_non_raw_results(moving)
def checkMovingOLS(self, window_type, x, y, **kwds):
window = tools.rank(x.values) * 2
moving = ols(y=y, x=x, window_type=window_type, window=window, **kwds)
if isinstance(moving.y, Series):
index = moving.y.index
elif isinstance(moving.y, LongPanel):
index = moving.y.major_axis
for n, i in enumerate(moving._valid_indices):
if window_type == "rolling" and i >= window:
prior_date = index[i - window + 1]
else:
prior_date = index[0]
date = index[i]
x_iter = {}
for k, v in x.iteritems():
x_iter[k] = v.truncate(before=prior_date, after=date)
y_iter = y.truncate(before=prior_date, after=date)
static = ols(y=y_iter, x=x_iter, **kwds)
self.compare(static, moving, event_index=i, result_index=n)
_check_non_raw_results(moving)
def __init__(self, sys, indep_endog=None, instruments=None):
if len(sys) % 2 != 0:
raise ValueError, "sys must be a list of pairs of endogenous and \
exogenous variables. Got length %s" % len(sys)
M = len(sys[1::2])
self._M = M
# The lists are probably a bad idea
self.endog = sys[::2] # these are just list containers
self.exog = sys[1::2]
self._K = [tools.rank(_) for _ in sys[1::2]]
# fullexog = np.column_stack((_ for _ in self.exog))
self.instruments = instruments
# Keep the Y_j's in a container to get IVs
instr_endog = {}
[instr_endog.setdefault(_,[]) for _ in indep_endog.keys()]
for eq_key in indep_endog:
for varcol in indep_endog[eq_key]:
instr_endog[eq_key].append(self.exog[eq_key][:,varcol])
# ^ copy needed?
# self._instr_endog = instr_endog
self._indep_endog = indep_endog
_col_map = np.cumsum(np.hstack((0,self._K))) # starting col no.s
# move this check to whiten since we're not going to build a full exog?
for eq_key in indep_endog:
try:
iter(indep_endog[eq_key])
except:
# eq_key = [eq_key]
raise TypeError, "The values of the indep_exog dict must be\
iterable. Got type %s for converter %s" % (type(del_col))
# for del_col in indep_endog[eq_key]:
# fullexog = np.delete(fullexog, _col_map[eq_key]+del_col, 1)
# _col_map[eq_key+1:] -= 1
# Josef's example for deleting reoccuring "rows"
# fullexog = np.unique(fullexog.T.view([('',fullexog.dtype)]*\
# fullexog.shape[0])).view(fullexog.dtype).reshape(\
# fullexog.shape[0],-1)
# From http://article.gmane.org/gmane.comp.python.numeric.general/32276/
# Or Jouni' suggetsion of taking a hash:
# http://www.mail-archive.com/[email protected]/msg04209.html
# not clear to me how this would work though, only if they are the *same*
# elements?
# self.fullexog = fullexog
self.wexog = self.whiten(instr_endog)
def test_rank(self):
X = standard_normal((40,10))
self.assertEquals(tools.rank(X), 10)
X[:,0] = X[:,1] + X[:,2]
self.assertEquals(tools.rank(X), 9)